臺大公衛學院為加強宣導本院教師之學術成果，進而提升本院國際能見度，由江東亮老師與張齡尹老師之共同撰寫下列文章投稿至ASPPH Friday Letter.

該文目前已刊登於 ASPPH Friday Letter, April 5, 2024

作者：

Chia-Shuan Chang(本所碩士班校友張家瑄), Ling-Yin Chang (本所合聘教師張齡尹副教授及通訊作者), Chi-Chen Wu, Hsing-Yi Chang

期刊名稱：SLEEP

發表日期：2024.01.11

發表文章：

Associations between social jetlag trajectories and body mass index among young adults

摘要/Abstract

Objectives

This study employed longitudinal data collected repeatedly from individuals over the course of several years to examine the trajectories of social jetlag from ages 11 to 22 years and their associations with subsequent body mass index (BMI). Potential sex differences were also investigated.

Methods

Data were obtained from two longitudinal studies conducted in Taiwan (N = 4287). Social jetlag was defined as ≥ 2 hours of absolute difference in sleep midpoint between weekdays and weekends. BMI was calculated using weight (kg)/height(m)2 and categorized as underweight (<18 kg/m2), normal weight (18 kg/m2 ≤ BMI < 24 kg/m2), overweight (24 kg/m2 ≤ BMI < 27 kg/m2), and obese (≥27 kg/m2). Group-based trajectory modeling and multinomial logistic regression were applied to investigate study objectives.

Results

Four distinct trajectories of social jetlag throughout the adolescent years were identified, with corresponding proportions as follows: low-stable (42%), moderate-decreasing (19%), low-increasing (22%), and chronic (17%) trajectories. Among males, the risk of being underweight (aOR, 1.96; 95% CI: 1.35 to 2.84) or obese (aOR, 1.40; 95% CI: 1.02 to 1.92) was higher in individuals with a low-increasing trajectory than in those with a low-stable trajectory. Among females, those with a low-increasing (aOR, 1.61; 95% CI: 1.02 to 2.54) or chronic (aOR, 2.04; 95% CI: 1.27 to 3.25) trajectory were at a higher risk of being obese relative to those with a low-stable trajectory.

Conclusion

Addressing the development of increasing or chronic social jetlag during adolescence can help prevent abnormal BMI in young adulthood. Practitioners should consider sex differences in treatment or consultation.

關鍵字/Keyword